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From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7) Gecko/20040803 Firefox/0.9.3 Description of problem: A long-standing bug that caused the Adobe Acrobat Reader plugin to consume 100% of CPU wasfixed in Mozilla 1.7, at least partially (bug 198954 at bugzilla.mozilla.org). The Fedora-packaged Mozilla 1.7.2-0.2.0 still suffers from the bug. This appears to be because of the compilation options or patches in the Fedora package. The problem is that Mozilla apparently performs Gtk2 redraws constantly. The bug only affects Gtk2 builds. Gtk1 builds, such as mozilla.org binaries, work ok. Compiling Mozilla 1.7.2 from the unpatched, pristine mozilla.org sources gave binaries on which the Acrobat plugin worked without problems. The compilation options were as follows: export CXXFLAGS="-march=pentium3 -Os" export CFLAGS="-march=pentium3 -Os" export LIBIDL_CONFIG=/usr/bin/libIDL-config-2 in .mozconfig ac_add_options --enable-calendar ac_add_options --disable-debug ac_add_options --enable-xft ac_add_options --enable-crypto ac_add_options --prefix=/opt/mozilla-1.7.2 The Acrobat plugin version tested is 5.0.8 for both the Mozilla compiled from source with the above options (no problem) and Fedora's mozilla-1.7.2-0.2.0 (100% of CPU consumed when plugin is loaded). Version-Release number of selected component (if applicable): mozilla-1.7.2-0.2.0 How reproducible: Always Steps to Reproduce: 1. Install Adobe Acrobat plugin for Mozilla. 2. Restart Mozilla. 3. Open a PDF file in Mozilla via plugin. Actual Results: Mozilla / X consumes 100% of CPU for as long as the plugin is loaded. Expected Results: CPU should be idle after the plugin has loaded and the PDF opened, if the user does not do anything. Additional info: The bug in bugzilla.mozilla.org has been reopened after it was supposedly fixed in 1.7. I guess the bug can be triggered in with some compile-time options even without the patches in the Fedora package.
The upstream bug has more information: http://bugzilla.mozilla.org/show_bug.cgi?id=198954
Fedora Core 2 is now maintained by the Fedora Legacy project for security updates only. If this problem is a security issue, please reopen and reassign to the Fedora Legacy product. If it is not a security issue and hasn't been resolved in the current FC3 updates or in the FC4 test release, reopen and change the version to match.